CVE-2026-16403mediumCWE-451

CVE-2026-16403: medium-severity vulnerability in Mozilla Firefox

Spoofing issue in the Address Bar component

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13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 6.5epss 0.4%
Spoofing issue in the Address Bar component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Affected products
Mozilla · FirefoxMozilla · Thunderbird
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